C Programming · all questions

C Preprocessor
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Q81

The pragma . . . . . . . . is used to remove an identifier completely from a program.

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Q82

What will be the output of the following C code if the value of 'p' is 10 and that of 'q' is 15?

#include<stdio.h>
int main()
{
    int p,q;
    printf("Enter two numbers\n");
    scanf("%d",&p);
    scanf("%d",&q);
    #if(4<2)
    printf("%d",p);
    #elif(2>-1)
    printf("%d",q);
    #else
    printf("bye");
    #endif
}

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Q83

What will be the output of the following C code?

#include <stdio.h>
#define p( n ) printf( "t" #n " = %d", t##n )
int t3=10;
int main()
{
   p(3);
}

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Q84

What will be the output of the following C code?

#define hello(c) #c
main()
{
    printf(hello(i,am));
}

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Q85

Which of the following attributes is used to specify that the minimum required memory to be used to represent the types?

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Q86

What will be the output of the following C code?

#include<stdio.h>
#define ram 557
int main()
{
    #ifndef ram
    printf("yes");
    #endif
    printf("no");
}

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Q87

The correct syntax of the attribute packed is . . . . . . . .

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Q88

What will be the output of the following C code?

#define hello(c,d) #c #d
main()
{
    printf(hello(i,"am"));
}

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Q89

What will be the output of the following C code?

#define display(a) #a
main()
{
    printf(display("56#7"));
}

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Q90

What will be the output of the following C code?

#include<stdio.h>
#pragma GCC poison printf
main()
{
    printf("example");
    return 0;
}

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Q91

Which of the following is a stringizing operator?

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Q92

What will be the output of the following C code?

#include <stdio.h>
#define hello( n ) printf( "a" #n "= %d", a##n )
int a3=3;
int main()
{
    #ifdef a3
       hello(3);
   #else
       printf("sorry");
   #endif
}

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Q93

What will be the output of the following C code?

#define sqr(x) x*x
main()
{
    int a1;
    a1=25/sqr(5);
    printf("%d",a1);
}

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